Objects
Everything is made where it is left.
Radio
Records: What the room is playing.
Plays back: On the same dial, in the same room.
Flip phone
Records: A call to the place.
Plays back: When you open it there again.
Paper and pen
Records: A memory, written by hand.
Plays back: Read where it was written.
Used at: Grizzly Peak Time Machine
Payphone
Records: Your voice, through the handset.
Plays back: Through the same handset, where it was left.
Walkie-talkie
Records: One voice to one other.
Plays back: On the channel it was left on.
Vocoder
Records: A voice, changed as it is left.
Plays back: Changed back, at the place.